CVE-2026-74668
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
packet: use consistent hard_header_len in TX_RING send path
In the Linux kernel, the following vulnerability has been resolved: packet: use consistent hard_header_len in TX_RING send path tpacket_snd() reads dev->hard_header_len independently for skb allocation and header construction in tpacket_fill_skb(). Concurrent netdevice reconfiguration can therefore make the reserved headroom smaller than the amount later pushed, or make copylen - hard_header_len negative. Snapshot hard_header_len once before processing ring frames and use it for the frame limit, headroom allocation, copy length, and skb construction. Pass the snapshot to tpacket_fill_skb(). The separate SOCK_DGRAM consistency problem between hard_header_len and header_ops->create is not addressed here.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | 9c7e8ff48c377bef18c3d178748aea0575b69ede | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | 2a73b2c37ee3060a880b53cd24783d93fc7be5f8 | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | e79f59a8527a49078cfaf8fe8fb5fcefc20c76d2 | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | d85d2fd54e901637c81d847811e03c662aee13cd | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | 016763e829cac37b3234eace86fd0a4c560de4a7 | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | 27e068d1b35dbec10a3cf268887c94407be4badc | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | d48ea5c9c4c34dc0df621f0e39ed3a16b644621a | Unavailable | None listed |
| 69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1 | affected | git | 21b5953e7494c16a42e6cd8cf110e18d13ae4a6b | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.31 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.31 | Unavailable | None listed |
| 5.10.267 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.218 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.185 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.152 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.104 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.45 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.9 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |